Proton transfer versus nontransfer in compounds of the diazo-dye precursor 4-(phenyl­diazenyl)aniline (aniline yellow) with strong organic acids: the 5-sulfosalicylate and the dichroic benzene­sulfonate salts, and the 1:2 adduct with 3,5-dinitro­benzoic acid

Smith, G.; Wermuth, U.D.; Young, D.J.; White, J.M.

doi:10.1107/S0108270109036622

Acta Crystallographica Section C
Acta Crystallographica
Section C STRUCTURAL CHEMISTRY

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Figure 3
The molecular configuration and atom-numbering scheme for the 4-(phenyldiazenyl)aniline and 3,5-dinitrobenzoic acid molecules in (III)

. The aniline molecule lies across a crystallographic inversion centre, with the single amine group having 50% occupancy. Displacement ellipsoids are drawn at the 50% probability level and H atoms are shown as small spheres of arbitrary radii. Dashed lines indicate inter-species hydrogen bonds. [Symmetry code: (iii) −x + 1, −y + 4, −z + 1.]

STRUCTURAL
CHEMISTRY

ISSN: 2053-2296

Volume 65| Part 10| September 2009| Pages o543-o548

doi:10.1107/S0108270109036622

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